Second series of Line Of Duty sees DI Denton under investigation, The Bill meets Broadchurch in Suspects and Midsomer Murders goes to Copenhagen.

Line Of Duty, BBC2, 9pm

The explosive second-series opener of Jed Mercurio’s police thriller finds Keeley Hawes as DI Lindsay Denton on the wrong side of investigations.

She’s the duty officer who survived the ambush of a vital police witness but was corruption or incompetence to blame for the leak that facilitated the attack?

Supt Ted Hastings (Adrian Dunbar) and his police anti-corruption unit are on the case, while DC Fleming pleads personal reasons.

Which clears the way for the arrival of Detective Constable Georgia Trotman (Jessica Raine).

While Denton is being given a hard time by all around her, keen DC Trotman inclines toward the benefit of the doubt.

Suspects, Channel 5, 10pm

It’s The Bill meets Broadchurch as a toddler goes missing from the home she shares with her brother and father in the opening case of this new police drama, where improvised dialogue lends a gritty edge to the action.

Fay Ripley leads inquiries as DI Martha Bellamy as we follow the painstaking process of sifting through the evidence and interviewing the immediate suspects – starting with the victim’s family.

Damien Molony and Clare-Hope Ashitey lend fine support.

Midsomer Murders, ITV, 8pm

A treat for fans of Nordic noir, the 100th episode of the bonkers British crime drama – it’s popular in Denmark, where it’s called Barnaby – goes on location in Copenhagen where Barnaby and Nelson (Neil Dudgeon and Gwilym Lee) join forces with Danish duo Poulsen (Ann Eleonora Jorgensen, The Killing) and Degn (Birgitte Hjort Sørensen, Borgen).

The case starts on home turf – at a biscuit factory where Joanna Scanlan and Sanjeev Bhaskar are bickering over recipes. Could one of them end up in a Jammie Dodger…?

Fleming, Sky Atlantic, 9pm

Dominic Cooper shakes and stirs smoothly as he takes on the persona of author Ian Fleming, the man who gave the world James Bond, in a four-part biographical drama every bit as colourful as any 007 caper.

The story opens at Fleming’s Jamaican home, Goldeneye, where he’s honeymooning with wife Ann (Lara Pulver) before rewinding back through the wartime military escapades that provided the feckless young Fleming with rich source material for his books.

Inside No.9, BBC2, 10pm

There’s some quality comedy on offer tonight, with the second instalment of Reece Shearsmith and Steve Pemberton’s address-based series paying inspired homage to silent movies in a dream home robbery caper co-starring Denis Lawson and Oona Chaplin.

A word of warning: dog lovers should look away. Over on Sky Atlantic from 10pm, Metro favourite This Is Jinsy closes a fine second series with a double bill that finds room for guest cameos from Derek Jacobi, Olivia Colman and Phil Davis. Hurry back, nightly byes.

Films of the day

Paul, Film4, 9pm

Ahead of Nick Frost shimmying on to the big screen in Cuban Fury, this is a reminder of how we came to love him: his double act with Simon Pegg.

Clearly aimed at ‘breaking the States’, it sees two girlfriendless geeks (Frost and Pegg) embark on a US road trip to Area 51.

Here they meet Paul (voiced by Seth Rogen), a potty-mouthed, dope-smoking alien who crash-landed on Earth and is now on the run from the US government’s men in black.

A winning mix of fart gags and feel-good humour, with Kristen Wiig (Bridesmaids) giving the token female love interest role some memorable oompf as a one-eyed Christian fundamentalist.

Attack The Block, Film4, 11.05pm

Stay up and make it a Brit double bill with this cult comedy/horror from Joe Cornish in which ‘big alien gorilla-wolf motherf***ers’ crash-land on a south London council estate, little knowing they face the universe’s most feared foes: hoodies.

The script suggests the government sent in aliens because black people ‘aren’t killing each other fast enough, so they decided to speed up the process’ but the ‘issues’ bit isn’t thunked home in a street-smart mix of ET and This Is England: here’s hoping Cornish delivers a follow-up soon.